Extraction of Axial Mass and Strangeness Values from the MiniBooNE Neutral Current Elastic Cross Section Measurement

TL;DR

This paper analyzes MiniBooNE neutrino scattering data using NuWro, extracting axial mass and strangeness parameters, and finds results consistent with previous measurements, providing insights into nucleon structure.

Contribution

It introduces a detailed analysis of MiniBooNE data with NuWro, including two-body currents, to extract axial mass and strangeness contributions, which is a novel approach.

Findings

Axial mass M_A = 1.10^{+0.13}_{-0.15} GeV

Strangeness contribution g_A^s = -0.4^{+0.5}_{-0.3}

Results consistent with previous evaluations

Abstract

Results of the analysis of the MiniBooNE experiment data for the neutral current elastic neutrino scattering off the $CH_{2}$ target with the NuWro Monte Carlo generator are presented. Inclusion in the NuWro the two body current contribution leads to the axial mass value $M_A = 1.10^{+0.13}_{-0.15}$ GeV consistent with the older evaluations based on the neutrino-deuteron scattering data. The strange quark contribution to the nucleon spin is estimated with the value $g_A^s = -0.4^{+0.5}_{-0.3}$.